diff --git a/extension/Tests/Unit/Core/Form/DirtyTest.php b/extension/Tests/Unit/Core/Form/DirtyTest.php
index 740f7a31ba5a16ee8a7800ee4ca1df747d380142..f8a18f000fa7d8e1165cf280d25f6aef6c3ff69b 100644
--- a/extension/Tests/Unit/Core/Form/DirtyTest.php
+++ b/extension/Tests/Unit/Core/Form/DirtyTest.php
@@ -9,7 +9,7 @@
 namespace IMATHUZH\Qfq\Tests\Unit\Core\Form;
 
 use IMATHUZH\Qfq\Core\Database\Database;
- 
+
 use IMATHUZH\Qfq\Core\Form\Dirty;
 use IMATHUZH\Qfq\Core\Store\Session;
 use IMATHUZH\Qfq\Core\Store\Sip;
@@ -17,6 +17,8 @@ use IMATHUZH\Qfq\Tests\Unit\Core\Database\AbstractDatabaseTest;
 
 require_once(__DIR__ . '/../Database/AbstractDatabaseTest.php');
 
+const MSG_RECORD_ALREADY_LOCKED = 'Record already locked';
+
 /*
  * Open to check
  * - FORM_DELETE
@@ -352,7 +354,7 @@ class DirtyTest extends AbstractDatabaseTest {
         // Alice lock again
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT_ALLOW_FORCE, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
@@ -508,7 +510,7 @@ class DirtyTest extends AbstractDatabaseTest {
 
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT_ALLOW_FORCE, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
@@ -700,8 +702,8 @@ class DirtyTest extends AbstractDatabaseTest {
         // Alice lock again
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
-        $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT, API_MESSAGE => $msg];
+        $msg = MSG_RECORD_ALREADY_LOCKED;
+        $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT_ALLOW_FORCE, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
         $result[API_MESSAGE] = substr($result[API_MESSAGE], 0, strlen($msg));
@@ -855,7 +857,7 @@ class DirtyTest extends AbstractDatabaseTest {
 
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
@@ -977,7 +979,7 @@ class DirtyTest extends AbstractDatabaseTest {
 
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT_ALLOW_FORCE, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
@@ -1065,7 +1067,7 @@ class DirtyTest extends AbstractDatabaseTest {
 
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp
@@ -1109,7 +1111,7 @@ class DirtyTest extends AbstractDatabaseTest {
 
         $result = $dirty->process();
 
-        $msg = 'Record already locked ';
+        $msg = MSG_RECORD_ALREADY_LOCKED;
         $expected = [API_STATUS => API_ANSWER_STATUS_CONFLICT, API_MESSAGE => $msg];
 
         // cut IP, User and Timestamp